Your spreadsheet is your operating system. It reflects the optimal settings for your program to run.
If you want to live at an optimal level, you must know the ideal parameters your program was designed for.
If it can't be quantified, it can't be measured.
If you don't know settings, you'll run the default mode network which is not and optimized way of living.
When you begin living life by the spreadsheet, decisions on what to do next become easy. As Christine Comaford would tout - you need to watch your needle movers.